The 7 Habits of Highly Effective People by Stephen Covey

Covey is an international best seller for good reason. You may not find everything is this book applicable and you may not be able to implement it all but plenty of people credit it with changing their lives. It fits perfectly with the central theme of I will Strive that in order to change things you have to do the changing, you have to adopt new behaviours and new habits. Give it a try!